Dyestuff of the anthanthrone series



Patented Oct. 24, 1933 FATE ormer.

DYESTUFF OF THE ANTHANTHRONE SERIES Rudolf Heidenreich, Leverkusen-on-the-Rhine, Germany, assignor to General Aniline Works,

Inc., New York, N.

Delaware Y ,a corporation of No Drawing. Application March 30, 1928, Serial No. 266,099, and in Germany April 9, 1927 8 Claims.

The present invention relates to new dye-stuffs of the anthanthrone series and to a process of preparing same. r

I have found that when reacting with ring clos- 'Iing agents upon the compounds obtainable by condensing halogenated anthanthrones or derivatives thereof with aminoanthraquinones or derivatives thereof which compounds probably are anthanthrone-anthrimides, new worthful vat dyestufis are obtainable which dye cotton strong shades of various tints and of excellent iastness. Both acidic and alkaline ring closing agents may be used, for instance: concentrated sulfuric .acid, chlorosulfonic acid, a mixture of anhydrous aluminium chloride and sodium chloride, a mixture of potassium hydroxide and alcohol and the like. In the case that sulfuric acid is used as ring closing agent it is of advantage to subject the :resulting products to the action of an oxidizing mixture of potassium hydroxide and methyl alcohol temperature of 200-250 C. are useful.

-With the knowledge at present at our disposal we presume that new intramolecular ring formation takes place with the probable formation of-carb'azole derivatives in the case of acid ring closing agents, whereas pyridine ring formation probably will occur in the case of using an alkalinering closing agent. I

The products thus,v obtainable form dark powders difficultly soluble inflth'e usual organic solvents soluble in strong sulfuric acid with brown to green colorations dyeing cotton'from the hydrosulfite vat khaki-brown to grey shades of good fastness.

The following examplesillustrate my invei'i -f thrimide of the probable formula:

- 11506-0 G-NHGOCH:

agent. The'temperature at which reaction takes place varies within wide limits depending from the kind of the ring closing agent used. Thus, when working with acid ring closing agents such as concentrated sulfuric acid or chlorosulfonic acid, a temperature of about to C. may ,be of advantage while when working with a are dissolved in 100 parts of concentrated sulfuric acid at ordinary temperature. Soon the coloration of the solution changes from blueish green to dull olive. By stirring it into water, to which a little sodium nitrite, chromic acid, or an other oxidizing agent has vbeen added, a dyestuff separates, which dyes cotton from the vat, dark violet brown shades. The product probably corresponds to the formula:

anthrimide of the probable formula:

m Or ll 0 O are introduced into 100 parts of chlorosulfonic acid, whereupon the temperature rises spontaneously to about 30 C. The mixture is now either left to stand for some time at room temperature or heated to about 35-45 C. The reaction is complete, when the solution has acquired a deep blue coloration. Test portions in concentrated sulfuric acid change from yellowish brown through a dirty green to a clear greenish blue. Test portions'in water change from grey to khaki. When working up the melt in the customary manner for example, by pouring the melt, after dilution with strong sulfuric acid, into ice water, filtering and washing with water until neutral a dyestuff is obtained which dyes cotton from a wine red vat a particularly fast powerful khaki shade in contradistinction to the grey dyeing of the starting material. The product probably oorresponds to the formula:

HNWQCPNH o 'When using as starting 'material the anthathrone anthrimide of the probable formulaz 7 a product is obtained which forms a dark powder difiicultly soluble in the usual organic solvents soluble in strong sulfuric acid with a dull green coloration and whichdyes cotton'from the O hydrosulfite vat strong greyish blue shades of probably have the structural formula:

good fastness. V v

Itprobably corresponds to the formula:

v nsou oo-Nn o Similar dyestufi s are obtainable whenstarting from anthanthrone-anthr'imides obtained by condensing halogen-anthanthrones containing Example 3.Four parts of anhydrous aluminfig f g halogen atoms wlth mm ium chloride are mixed with onepart of sodium 1:33 on chloride and melted for about 2 hours at about l90 2l0 C. with one part of the anthathroneanthrimideoi the probable formula;

1. The process which comprises reacting upon an:anthanthrone-dianthrimide with an acidic ring' closing :agent at 'a temperature between aboutl5 and about 250 C.

an-anthanthrone dianthrimidewith a compound of the formula:'; I 5

wherein X stands for chlorine or the hydroxy i group at temperatures ranging from about 15 to gabout 45 C.

3. The process, which comprises reacting with a compound ofthe formula:

On working up in the customary manner a dark powder is obtained which gives a dirty olive soluv 5 *OH v tion in concentrated sulfuric acid, and dyes cotton beautiful slate grey shades of very satisfac- I tory fastness properties.

The same dyestuff is obtained when employing instead of the aluminium chloride sodium chloride mixture a mixture of aluminium chlowherein X stands for chlorine -or the hydroxy group at temperatures ranging from about 15 to ride' and anhydrous pyridine. The dyestuffs.

2. The process, which comprises reacting upon about 45 C. upon an anthanthrone-anthrimide of the probable general formula:

A-HN

wherein the two As stand for anthraquinone nuclei which may be substituted by methoxy and benzoyl-amine groups.

4. The process, which comprises reacting with a compound of the formula: V

wherein X stands for chlorine or the hydroxy group at temperatures ranging from about 15 to about 45 C. upon a compound of the probable general formula:

wherein in case wand 2 stand for the benzoylamino group, as and 1 represent hydrogen atoms or in case x and y stand for the benzoylamino group, 10 and 2 represent hydrogen atoms.

5. The process, which comprises reacting with chlorosulfonic acid at a temperature of between about 35 and about 45 C. upon the compound of the probable formula; I

6. The products of the probable general formula:: v c

wherein the anthraquinone nuclei may be substituted by methoxy and benzoylamino 'groups, being dark powders, difiiculty soluble in the usual organic solvents, soluble in strong sulfuric acid with brown over blue to green colorations, dyeing cotton from an alkaline hydrosulfite vat khaki brown to grey shades of good fastness.

7. The products of the probable general foramino group, as and y represent hydrogen atoms or in case at and y stand for the benzoylamino group w and 2 represent hydrogen atoms, said products being dark powders, difficultly soluble in the usual organic solvents, soluble in strong 139 sulfuric acid with greenish blue to green colorations, dyeing cotton from an alkaline hydrosulfite fastness.

vat strong greyish blue to khaki shades of good wherein 8. The products of the probable general formula the linkages 1-1 and 2-2 are attached. 

